I'm having the same problem on Firefox. Weird thing, it looked great when I first started using it on my old laptop while I was at work. Now that I come home on my brand new desktop the rounded corners are gone. Same problem on both Firefox and Internet Explorer. Not good at all, if this is how other people see my wiki. It's been a couple of years since the last post was made, any news?

The height of the #header element is 7em, but the heights of #header-extra-div-* are set to fixed 92px, and the pencil elements have a fixed top of 100px.

Being fixed values, instead of relative ones, gives visual problems when the base font-size is different than the standar 16px. It happens when the user has touched the settings on his browser to a bigger or smaller base font size.

I suggest a solution like the next lines of CSS, which solves the problem: